Prince Charles has arrived at King Edward VII’s hospital in London to visit his dad Prince Philip.Charles arrived at the back of the London hospital where Philip, the 99-year-old husband of Queen Elizabeth,has been since Tuesday.The Duke of Edinburgh is expected to remain in hospital until next week.He was driven 26 miles from Windsor Castle in a private car and walked into the hospital unaided.Upon his arrival at hospital, a spokesperson for Buckingham Palace said in a statement: "His Royal Highness The Duke of Edinburgh was admitted to the King Edward VII Hospital in London, on Tuesday evening."The Duke's admission is a precautionary measure, on the advice of His Royal Highness's Doctor, after feeling unwell."They added: "The Duke is.